Control device for an advancing support in underground mining

Abstract

An improved control for an underground mining working support unit arrangement of the type having an adjacent support unit arrangement hydraulically connectable to the working support unit arrangement in which a plurality of hydraulic supports support load points, it is disclosed wherein the hydraulic supports are successively connectable to several of the load points with a reversing valve operable to alternately connect control valves to selected hydraulic supports.

What is claimed is: 
     
       1. An improved control device for an underground mining working support unit arrangement having hydraulic supports for supporting several load points, means for admitting a hydraulic working medium to the hydraulic supports, the admitting means including an adjacent support unit arrangement hydraulically connected to a working support unit arrangement, a control block having control valves and control conduits connected to the adjacent support unit arrangement for connecting the hydraulic supports for supporting the load points with the control valves, and each of the conduits having a nominal diameter which permits direct control of the hydraulic supports for supporting the control points, the improved control which comprises means for connecting the hydraulic supports for supporting several load points successively over the same control conduits to the control valves of the adjacent support unit arrangement, said connecting means including reversing valves connected to the hydraulic supports of the working unit support arrangement and the conduits and over which the hydraulic supports for supporting the load points are connectable. 
     
     
       2. An improved control device according to claim 1, wherein the control valves includes an adjusting control valve on the adjacent support unit arrangement for actuating said reversing valves from the control valve block over said adjusting control valve. 
     
     
       3. An improved control device according to claim 1, or claim 2, wherein the conduits include a control line connecting said reversing valves to the control valves, the control line having the same nominal diameter as the control conduits, and wherein the conduits comprise a multiple hose line. 
     
     
       4. An improved control device according to claim 1, wherein said reversing valves are connectable to a selected group of the hydraulic supports for supporting the load points and are simultaneously actuable. 
     
     
       5. An improved control device according to claim 1, wherein said reversing valves connect the hydraulic supports supporting the load points which have a large media consumption per unit of time with the control valves. 
     
     
       6. An improved control device according to claim 2, wherein said adjusting control valve is a self closing valve. 
     
     
       7. An improved control device according to claim 2, wherein the control valves associated with the control block are interchangeable. 
     
     
       8. An improved control for an underground mining working support unit arrangement of the type having an adjacent support and arrangement hydraulically connectable to the working support unit arrangement, a plurality of hydraulic supports composed of piston-cylinder units having a cylinder with a bore and a piston member slidably mounted in the bore of the cylinder for displacement responsive to a hydraulic working medium admitted in first and second compartments in the cylinder on opposite sides of the piston member, means for admitting the hydraulic working medium to the bore, the admitting means having control conduits connected to each of the compartments of each piston-cylinder unit and control valve means interposed in the conduits for controlling the admission of the hydraulic working medium, the admitting means being hydraulically connected to the adjacent support unit arrangement, the hydraulic supports supporting a plurality of load points, and each of the conduits having a nominal diameter which permits direct control of the hydraulic supports, the improvement comprising means for successively connecting selective hydraulic supports for supporting several of the load points to the control valve means, and said connecting means including at least one reversing valve operable to alternately connect control valves to selected hydraulic supports.